Klein, Andreas ; Löher, Thomas ; Pettenkofer, C. ; Jaegermann, Wolfram (2021)
Chemical interaction of Na with cleaved (011) surfaces of CuInSe₂.
In: Journal of Applied Physics, 1996, 80 (9)
doi: 10.26083/tuprints-00019909
Article, Secondary publication, Publisher's Version
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| Item Type: | Article |
|---|---|
| Type of entry: | Secondary publication |
| Title: | Chemical interaction of Na with cleaved (011) surfaces of CuInSe₂ |
| Language: | English |
| Date: | 2021 |
| Place of Publication: | Darmstadt |
| Year of primary publication: | 1996 |
| Publisher: | AIP Publishing |
| Journal or Publication Title: | Journal of Applied Physics |
| Volume of the journal: | 80 |
| Issue Number: | 9 |
| DOI: | 10.26083/tuprints-00019909 |
| Corresponding Links: | |
| Origin: | Secondary publication service |
| Abstract: | To study the beneficial effect of sodium‐containing substrate material on the photovoltaic properties of thin‐film CuInSe₂ solar cells the chemical interaction of Na with CuInSe₂ has been investigated by synchrotron excited photoelectron spectroscopy. A clean CuInSe₂ (011) surface was prepared by cleaving an oriented single crystal in UHV. The cleaved surface exhibits an electron affinity of χ≊4.6 eV. The Se 3d level shows a surface core level shift of −0.4 eV. Na was sequentially deposited in UHV in small steps from a commercial dispenser source. Initially ionized Na adsorbs on the surface leading to a shift of the surface Fermi level by 0.3 eV closer to the conduction band. Removal of Cu from the surface is observed. For higher Na deposition a chemical reaction of Na with the CuInSe₂ surface occurs leading to the formation of metallic indium and Na₂Se. |
| Status: | Publisher's Version |
| URN: | urn:nbn:de:tuda-tuprints-199095 |
| Classification DDC: | 500 Science and mathematics > 530 Physics |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Surface Science |
| Date Deposited: | 15 Nov 2021 13:15 |
| Last Modified: | 23 Jan 2023 07:22 |
| URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/19909 |
| PPN: | 50397837X |
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